The weather's warming up and we're finally able to strip off all of those bulky amounts. The only downside is the nasty shock, when we notice advertisements what's lurking underneath. For countless reasons, many of us are likely to put a greater focus on exercise, as the summer months approach. Of course, getting fit can be quite an expensive endeavor - but it doesn't have to be. Just give it a bit of thought and consideration, before you pull out the plastic. It'll help you trim the fat in…